My '98 Camry 2.2L engine is one of the easiest cars to change plugs on that I ever had. When it came out as new 16 years ago, they recommended the then-new double electrode platinum plugs, supposed to last about 60,000 miles. But I enjoy working on my car, and feel that since these plugs cost about 1/3 of what the double-platinum or iridium cost, I'd prefer replacing these with new every 20,000 miles. I don't care to use any plugs for "extended use" and prefer instead a fresh plug over the "best" plug for the job. My car now has 165,000 miles and runs and idles very well, burning essentially no oil.When I removed my Denso PK20TRII double-platinum-electrode spark plugs after 40,000 miles, the gap seems to have opened slightly, but what's worse there is a minor build-up of tan-colored rust-like deposit on a couple of them. It's a crusty and hard substance I can mostly scrape off with a fingernail, and the thickness of a fingernail, especially on the side electrodes, perhaps mostly a carbon deposit. But they were working fine and not really worn out at all, mainly just cruddy.I replaced those old Denso's with (4) of these NGK's and had almost enough money left over to buy a new set of NGK plug cables here, which I did. I also bought some dielectric grease ... Now I've driven about 400 miles since the change and my old 133hp car idles like a sewing machine, starts up almost instantly, and takes off and runs like a scalded dog! ... And I can afford a new FRESH set of these plugs at just 20,000 miles, 3x the 'freshness" of 60k plugs, so call me "old fashioned" I guess ... I like fresh new sparkplugs. I like NGK platinum fine-wire. I like to save money. I never liked those fancy-dandy double electrodes anyway ;-) Right now I'd highly recommend them for this car, along with perhaps slightly more frequent plug changes, all for top performance.(*)If I note any future fouling or other problems with these G-Powers before 20k miles, I promise to try and let you know here. For now I trust that they'll work great for a long time! And in no way do I mean that these are only 20k mile plugs, or that the Densos I had were "worn out" at 40k miles.